Very good question. With out knowing I would say the engine since it's still a fuel delivery system. 800 number in your owners manual for DC they would be the ones to ask for sure though.

 

For not having a agenda maybe you should lighten up a little on folks.We can all learn from each other.I for one think superduty posts are very helpful!! I would also want to know since your are so informed with the cummins diesel,are you a certified cummins mechinac?Just curious.coobie

 

 

I'll have to make a call tomorrow. According to the manual the the lift pump is not covered under the 5/100 cummins warranty. The 2006 manual lists the following as being covered for 5/100

cylinder block and all internal parts
cylinder head assemblies
core plugs
fuel injection pump and injectors
gaskets and seals for listed components
intake and exhaust manifold
oil pan
oil pump
timing gear and drive belts and/or chains and cover
turbocharger housing and internal parts
valve covers
water pump and housing

 

....and I think Bluebull has a very valid point on the high pressure issue.

 

If you read my original post on the subject, I said that blowing the filter was a possibility and that a gauge or tell tale should be used. I doubt the spec is 16 PSI though. And it is the differential pressure across the filter that matters, not the absolute pressure the pump is providing to the system, as far as the filter element goes anyway.

And just because the pump is capable of pushing 50 PSI doesn't mean it will be. The back pressure is only as much as the downstream restriction. With the CP3 bypass that is 5 PSI when the filter is clean and as high as you let it go with a dirty filter. Wanna stop at 10 PSI ? Change your filter.

I am sick of talking about lift pumps.

Out

 

The 95 gph FASS on my truck has 20-21 psi at normal operation and maintains 16+psi at WOT. I lost two cp3's, one lift pump and a couple of injectors on this truck before I installed the FASS pump at 40,000 miles (keep in mind it was almost stock then) since installing the FASS pump, I've had no fueling issues with over 80,000 on the truck now. 60 psi might be more than the filter housing can handle its hard to say, but time will tell.

If the new in tank pumps have around 7psi like my stock lift pump had I would not want to depend on it. Stock my truck had 3.5-4 psi of fuel delivery at WOT. Both pumps (cp3's) went out shortly after towing medium heavy loads over long distances.

 

Thanks for sharing that with us.

I have been trying to drive the point home about the CP3 needing a good fuel supply for a long time. Nothing like some concrete experience to back that up.

Once again, the CP3 will only output 60 PSI (or 100 PSI) if you let it. The filter housing will NOT take that kind of pressure. The lid breaks.

 

So quit posting.

I find it strange that people will take what is said here (and backed up by a few fancy numbers) gospel truth to the point that people with '05 trucks are paranoid about lift pump probs and consider installing an aftermarket system.
If you can't dazzle them with brilliance....
Superduty you bring up some valid points. You have over and over. I don't think your system is the best. Running the fuel through the fuel filter over and over is not a good idea IMO.
If the lift pump problem is still around (on stock trucks) why doesn't a lawyer start a class action suit?

 

Cummins certified mechanic, NO.
Spent the last 7 years reading, fixing, sweating, crying, shedding blood, arguing with dealership over cummins problems, talking with DC, arbitration, modifing cummins engine. Two years auto mechanic training 25 years ago and persued a different occupation. Overhauled dozens of engines, built hot rods, sold hot rods. Cummins certified, No.

I guess maybe I lied, I do have an agenda, to see nobody gets taken advantage of because of their lack of knowledge.

 

You know people I've taken alot of bashing from some of you guys for pointing out obvious flaws with superdutys setup only because I wanted people to be aware of those problems if they choose to do his setup. I guess maybe I should have kept my mouth shut and let you learn from experienceing the problems yourself. I have no dog in this hunt, if you want me to go away just say so I left the TDR for the same reason. It's no skin off my ares. I have been quite polite to superduty most of the tiime only to be given answers from both sides of his mouth. Read his last post, I could point out some interesting facts by going back and digging up his other posts. I better not, I might be picking on him, pooo hooo.

 

I'm in agreement with that.

 

If my "stock" in tank pump is designed to keep up with my stock Cummins need for diesel...... "IF" is the term that scares me. Why should I take that chance? Especially since I have some mods and probably need more than "stock" fueling. I don't see a problem at all with looking to supplement my fuel system. And I don't see a problem with thinking outside the box and not wanting to spend a small fortune on a FASS or something similar when it really isn't needed. I've installed many dozens of Holley blue and red, Mallory and Carter electric pumps with success and none of them cost over $150. Haven't used a Walbro yet, but I just might. Kudos to Superduty for his insight.
And I too have worked on and built hot rods from street Chevelles to Blown alcohol funny cars. Built many engines. Installed too many transmissions and rear ends...blah, blah...
And I for one don't feel I've been taken advantage of.... now those who spend big cash on a FASS or something similar might not feel the same way. You decide...

 

" Running the fuel through the fuel filter over and over is not a good idea IMO."

And exactly what training and expertise do you have to make that statement ?

Did you happen to notice that the fuel on the stock truck runs through the filter over and over ? What is it going to do, wear out the filter ?

I find it ironic that you Dodge guys have all the answers to lift pumps when you are the only ones that have been suffering with the problem. The Fords don't have a problem and nor do the Chevs. You'd think that after suffering lift pump problems with the 2nd gen and now the 3rd gens you would get your friggin head out of the sand and use something that works on another truck instead of using some POS carburetor pump. And you'd think that you'd shut up and listen to someone that knows something about lift pumps and fuel injection systems. But no.

You are in for yet another harsh lesson on the realities of lift pumps trying to feed a CP3 with the latest in tank pump. The pump ain't going to live and nor is the CP3. You've been warned. And it will be a repeat of the VP44 fiasco. And if you think warranty is going to save you, go do a poll in second gen forums and see how many of those pumps Cummins is covering these days.

I don't need to be called a liar or be told that I am talking out of both sides of my mouth. Enough of that crap.

A guy that works for Dodge on trucks emailed me back and said this:

"The lift pumps are made by Carter and they've been a ongoing nightmare. If it was me, I'd just put one inline and gut the factory one."

But what would he know ?

I am sick of fighting with you know it alls. You win. It is a clear waste of time trying to share anything with you guys and thus I am not going to do it any more. I will never again feel sorry for a Dodge truck owner that suffers a lift pump problem or a VP44 or CP3 failure. You guys get exactly what you deserve as far as lift pumps go.

Audios.

Tony: you need the CP3 bypass. That is the blue line. The rest of the parts list is in the original post.

One more thing. It doesn't make a darn bit of difference to the pump if it is pushing or pulling the fuel. The pressure differential is the same across the pump.

And we do know why Dodge lift pumps die. The motors burn out. You can verify that the next time one quits by listening for the sound of it running or not. Or, God forbid, take one apart and see what happened.

 

Wow, that was dramtic.